package com.jdk.code.stack;

import java.util.ArrayList;
import java.util.List;
import java.util.Queue;
import java.util.Stack;

public class TestMain {

    Stack stack;

    Queue queue;

//    Heap heap;
    public static void main(String[] args) {
        List list = null;

        for(Object o:list){
            System.out.println(o);
        }

    }
}
